Simple Question regarding posts.

Why don't people simply post their excerpts as .pdf attachments? I've been on another writing forum where that is not only practiced, it is encouraged. It just seems a lot easier to post an attachment of an excerpt, or even an entire copy of your work (if someone expresses interest in more). In that way, it is easier to read, pages are easier measured, and formatting, as in Novels, Poems, and Screenplays, can be easily held.

I don't want random files clogging up my Downloads folder. I don't want to have to wait for Adobe to open. For a screenplay, yes, I can kind of understand it.

Really, though, I want to critique line-by-line. If it's just in .pdf, I have to copy and paste from that, and sometimes people make it impossible to copy and paste (or even print) a .pdf because they're worried about it being stolen or whatever (something I do, by the way).

The main root for my disdain of just pasting an excerpt is simply because I will be posting excerpts of Screenplays, and it distracts me when I read an improperly formatted Screenplay and other people may feel the same. Looking at my work formatted not only incorrectly, but in a way that makes it look cluttered and inaesthetic makes me feel the work isn't at it's potential. Like the difference between a sketch and a painting.